Pencil-sharpener.



D. F. OLIVER.

PENCIL SHARPENE-R. APPLICATION FILED APR.27.1914- RENEWED NOV. 3, I9I7- Patented May 28, 1918.

2 SHEETSSHEET I.

VITNESSES: IN VENTOR jacfa f 022M91 D. F. OLIVER. PENCIL SHARPENER. APPLICAHON FILED APR.27. 19 14. RENEWED NOV. 3. I917.

Patented May 28,1918.

2 SHEETSSHEET 2 n 0 W 0 W J BY Jae/W A Pro RN x-zx- PENCIL-SHARPENER.

Specification of Letters Patent.

Patented May 28, 1918.

Application filed April 27, 1914, Serial No. 834,624. Renewed November 3, 1917. Serial No. 200,194.

To aZZ whom it may concern Be it known that I, DOCTOR F. OL1vnn,'a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and. usefulv Improvements in Pencil Sharpeners, of which the following is a specification.

This invention relates to a pencil sharpener.

One of the objects of the present invention is to provide a simple, substantial, easily operated sharpener in which the pencil is sharpened by a pair of oppositely revolved disks having abrasive surfaces; andto provide a simple, eiiicient form of gear transmission by which the disks may be revolved. Another object of the invention is to provide means for holding pencils of various diarn eters in a central position and in alinement with the grinding disks. A further object is to provide a pencil sharpener which is so constructed that it may be easily taken apart or assembled when it is desired to replace the worn grinding disks or remove the-grindings from the pencils.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a plan section of the device.

Fig. 2 is a vertical section on line ww, Fig. 3.

Fig. 3 is a vertical longitudinal section, showing one part of the casing partly removed.

Fig. 4 is an enlarged view of the pencil holder, showing its position with relation to the grinding disks.

Fig. 5 is a sideelevation of the pencil holder.

Referring to the drawings, A and B indi cate a pair of casings which are adapted to be locked together by a pair of spring latches 2 and 3 (see Fig. 1). 4. indicates a rectangular-shaped frame and 5 and 6 a pair of bearing extensions secured to same. Journaled in said bearing extensions is a pair of shafts 7 and 8, on the outer ends of which are secured gears 9 and 10, and on the inner ends of which are detachably mounted disks 11 and 12. The inner faces of the disks 11 and 12 are convex-shaped and covered with an abrasive material, such as sandpaper, corundum, and the like. The case sections are provided with bearing extensions l3 and 14 for the purpose of supporting the rectangular frame and to provide means bywhich the frame, with connected gears and grinding disks, may be revolved. This is accomplished in the following manner:

One end of the rectangular frame is pro vided with a shaft extension 15 which is sup-' ported by the bearing extension 13. Surrounding said shaft is a sleeve 16, on the inner end of which is formed a collar 17 and on the outer end of which is secured a crank 15. The shaft 15, with connected rectangular frame 4:, is slidably mounted within sleeve 16 within certain limits, and the limit of the sliding movement is obtained by slotting the sleeve 16, as indicated at 17, and

providing shaft 15 with a pin 18 which projects into the slot 17 The pin 18 also acts to form a driving connection between the end of the pencil, but also forms a support for this end of the rectangular frame, as indicated in Fig. 1. The pencil holder is cy' lindrical in shape and the sides of same are cut away, as at 20, at a curve which coincides with the convex surfaces of the grinding disks, as indicated in Fig. 4. The interior of the pencil holder is provided with a tapered bore, and the cutting-away of the sides, as indicated at 20, provides slots 21, of which there is one on each side, through which the pointed end of the pencil projects. The upper side of the pencil holder is grooved, as at 22, and a set-screw 23, carried by the rectangular frame and project in said slot, is adapted to secure the penoil holder in any position to which it may be adjusted with relation to the convex surfaces of the grinding disks.

Pivotally mounted in the outer end of the bearing extension 14, as at 24, is a short sleeve member 25, and engageable with the lower side of same is a spring 26. The sleeve is of smaller diameter than the interior of the bearing extension and will, therefore, be rocked into an angular position by the spring 26 when not otherwise acted upon.

In operation, it is only necessary to insert iii the pencil through the sleeve 25. until the end of the pencil projectsv through the slotted sides of the pencil holder. The crank is then turned in the direction of arrow a and the movement of same is transmitted througl'i. sleeve 16 and pin 18 to shaft 15, with connected rectangular frame a.

The outer edge of easing it. is perforated, as indicated at 27, to form teeth with which the gears 9 and 10 may engage. The revolving movement transmitted to the frame through the crank is consequently transmitted to the gears 9 and 10, causing these to turn planctarylike within the casing. The gears meshing with the perforations 2? will at the same time revolve about their own aXis and the movement is thus transmitted to the abrasive disks 11 and 12, causing these to revolve in opposite directions. The pencil is slowly fed by the operator and the sides of same, projecting through the slots in the pencil holder, are consequently ground away by the abrasive surfaces of the grinding disks l1 and 12. The spring-actuated, pivoted sleeve 25 is provided for the purpose of holding pencils of different diameters in a central position with relation to the pencil holder and also to secure the pencils in straight alinement with the grinding disks.

Casing A is provided with an inwardly turned base flange 28 by which it may be secured in a suitable support, indicated at 29, and casing E is provided with a pocket or receptacle 30 which is provided for the purpose of catching the grindings from the pencils. The spring latches, indicated at 2 and 3, are the means by which casing B is secured to casing A. It can thus be seen that casing 13 can be easily removed, with relation to the stationary casing, it is only necessary to press the latches inwardly when it is desired to separate the casings. The casings are separated when it is desired to empty the grindings collected from the pencils and also when it is desired to renew the abrasive surfaces or grinding disks.

The grinding disks are removed in the following manner:

Casing B is first removed, as indicated in Fig. The driving crank then turned backward a slight distance or just sutiicieut to bring pin 18 into alinement with the main slot 17. The rectangular frame t, with connected shaft 15, may then be pulled out, with relation to the casing it and sleeve l"? in which it is now supported, and the outward movement of the rectangular frame is limited by the length of the slot 17 and will stop when pin 18, in shaft 15, reaches the end of said slot. The rectangular frame thus pulled out brings the abrasive disks, with connected gears, in a position where they may be easily removed.

The removal of the grinding disks is ac complished as. follows:

Shafts 7 and S, on the inner ends of which the disks are supported, are provided with square shanks 28 and the abrasive disks are similarly provided with square sockets into which the shanks are adapted to project. The center portions of the shafts are cut away, as indicated at i and 8 and projecting into said cut away portions are pins 7 and S The pins 7" and 8 are secured in the bearing extensions 5 and 6 and are only provided for the purpose of limiting the outward or inward movement of the shafts 7 and 8 within the bearing extensions.

To remove the disks itis only necessary to grasp the gears 9 and 10 and pull these in an outward direction. This will pull the srpiare shanks out of the sockets in the respective grinding disks and will permit these to drop out of the rectangular frame. The outward movement, of the shaft, with connected gears, is limited by the cut away )ortions. 7 and 7 and pins 8 and 8". New disks may then be placed in position and the gears, with connected shafts, forced back until the square shanks are projected into the sockets in the new disks; the inward movement of the gears and shafts being limited in the same manner as the outward movement. The new disks having been replaced, it is now only necessary to force the rectangular frame, with connected shaft 15, backinto. position within the sleeve 16. This brings thepin 18 into register with notch 16 and will thus lock the parts together and in position. The teeth of the gears are similarly brought into register with the perforations. in the casing and these prevent the gears and connected shafts from moving in or out with relation to the bearing extensions 5 and 6 in which they are journaled. I

The casing B may then be replaced and snapped into position by the latches 2 and he whole device, when thus assembled, is again ready for use. i

A pencil sharpener constructed ashere shown is simple in construction and efficient in operation and takes less space than grinding sharpeners heretofore constructed. Furthermore, by reason of the removable disks, disks of varying convex surfaces may be used, thus producing any desired point to the pencil, long, medium or blunt.

The materials and finish of the several parts of the pencil sharpener are such as the experience and judgment of the manufacturer may dictate.

Having thus described my invention, what I claim and desire to secure by Letters Patent is l. in a pencil sharpener, the combination with a casing, of a frame journaled therein, oppositely extending bearing extensions on the frame, shafts mounted in the bearing extensions and extending within the frame in opposing relation to each other, opposing grinding members carried by the shafts within the frame and each being retained against longitudinal movement on its shaft by the opposing member, and means for rotating the shafts.

2. In a pencil sharpener the combination with a frame, of a pair of bearing extensions thereon, a shaft slidably and rotatably disposed in each bearing extension, a grinding disk on each shaft slidably and freely receiving the latter and arranged in the frame in opposing relation to the companion disk whereby each disk holds the opposing disk against movement longitudinally of its supporting shaft, the grinding disks being removable from the frame on sliding the shafts longitudinally to withdraw their support from the disks, and means for rotating the disks.

3. In a pencil sharpener, the combination of a casing having journal extensions formed thereon, a sleeve journaled in one of said extensions, a crank secured to the sleeve outside of the casing, a shaft slidably mounted and turnable with the sleeve, means for limiting the sliding movement of said shaft within the sleeve, a frame secured at one end to said shaft, a pencil holder secured in the op- I posite end of the frame and extending into the opposite casing bearing extension, a pair of grinding disks journaled in the frame, and means for revolving said disks.

4-. In a pencil sharpener, the combination of a casing having journal extensions formed thereon, a sleeve journaled in one of said extensions, a crank secured to the sleeve outside of the casing, a shaft slidably mounted and turnable with the sleeve, means for limiting the sliding movement of said shaft within the sleeve, 21 frame secured at one end to said shaft, a pencil holder secured in the opposite end of the frame and extending into the opposite casing bearing extension, a pair of shafts journaled in the frame, grinding disks secured on the inner ends of said shafts, gears secured on the outer ends of said shafts, and a stationary gear with which said gears intermesh.

5. In a pencil sharpener, the combination of a casing having journal extensions formed thereon, a sleeve journaled in one of said extensions, a crank secured to the sleeve outside of the casing, a shaft slidably mounted and turnable with the sleeve, means for limiting the sliding movement of said shaft within the sleeve, a frame secured at one end to said shaft, a pencil holder secured in the opposite end of the frame and extending into the opposite casing bearing extension, a pencil centering device in said bearing extension, a pair of shafts j ournaled in the frame, grinding disks secured on the inner ends of said shafts, gears secured on the outer ends of said shafts, and a stationary gear with which said gears intermesh.

6. In a pencil sharpener, the combination of a casing, a frame journaled and revoluble in said casing, a pair of bearing extensions on said frame, a shaft slidably and revolubly mounted in each of said bearing extensions, means for limiting the sliding movement of each shaft, a square shank formed on the inner end of each shaft, a grinding disk mounted on each shank, a gear secured on the outer end of each shaft, a stationary gear with which said gears intermesh, means for revolving the frame, and a pencil holder in the frame.

7. In a pencil sharpener, the combination of a casing, a frame j ournaled and revoluble in said casing, a pair of bearing extensions on said frame, a shaft-slidably and revolubly mounted in each of said bearing extensions, means for limiting the sliding movement of each shaft, a square shank formed on the inner end of each shaft, a grinding disk mounted on each shank, a gear secured on the outer end of each shaft, a stationary gear with which said gears intermesh, means for revolving the frame, a pencil holder in the frame, and means for holding a pencil in straight alinement with the grinding disks and pencil holder.

8. In a pencil sharpener, the combination with a casing composed of separable sections one of which is provided with a fixed gear, a frame journaled in each casing section transverse to the plane of the gear, said frame having limited sliding movement in said specified section and being removable from the component section, a shaft slidably and rotatably journaled in the frame, a grinding member slidably receiving the shaft and removable therefrom by sliding the shaft from the grinding member, and a gear fixed on the shaft and engaging with the fixed gear for driving the shaft and holding it from sliding, said slidable mounting of the frame in the first casing section permitting of the gears being disengaged from each other on separating the casing sections.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

DOCTOR F. OLIVER. lNitnesses W. W. HEALEY,

M. KANDERER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

